JP2016215488A - Maintenance unit and liquid injection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a maintenance unit capable of reciprocating wipers without switching a driving direction of a driving source, and a liquid injection device.SOLUTION: A maintenance unit includes: wipers 58 and 59 wiping a liquid injection section; a double rack member 81 having a pair of rack sections 87 and 88 consisting of a first rack section 87 and a second rack section 88 and reciprocating the wipers 58 and 59; and an intermittent gear 80 having a tooth section 90 alternately engaging with the pair of two rack sections 87 and 88 at the time of rotation in one direction F and a toothless section 97 disposed side-by-side with the tooth section 90 in a rotation direction. The double rack member 81 moves the wipers 58 and 59 in forward paths when the first rack section 87 engages with the intermittent gear 80, and moves the wipers 58 and 59 in return paths when the second rack section 88 engages with the intermittent gear 80.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a maintenance device and a liquid ejecting apparatus that perform maintenance of a liquid ejecting unit.

  A maintenance device provided in a liquid ejecting apparatus such as an ink jet printer performs wiping to remove a foreign matter adhering to the liquid ejecting part by reciprocating a wiper that wipes the liquid ejecting part (for example, a patent) Reference 1).

JP-A-6-143597

  By the way, when a motor is used as a drive source for reciprocating the wiper, the wiper is moved in the forward direction by rotational driving in one direction of the motor, and the wiper is moved in the backward direction by rotational driving in the other direction of the motor. In order to change the direction, it is necessary to switch the rotational drive direction of the motor, which causes a problem that the control becomes complicated.

  Such problems are not limited to ink jet printers, but are generally common in maintenance apparatuses that perform wiping by reciprocating a wiper.

  SUMMARY An advantage of some aspects of the invention is that it provides a maintenance device and a liquid ejecting apparatus that can reciprocate a wiper without switching a driving direction of a driving source.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A maintenance device that solves the above problems includes a wiper that wipes the liquid ejecting portion, a double rack member that has a pair of rack portions including a first rack portion and a second rack portion, and moves the wiper back and forth. The double rack, comprising: tooth portions alternately meshing with the two rack portions that make a pair when rotating in one direction; and a missing gear having a missing tooth portion arranged side by side with the tooth portions in the rotation direction. The member moves the wiper forward when the first rack portion meshes with the missing gear, and moves the wiper backward when the second rack portion meshes with the missing gear.

  According to this configuration, the wiper moves in the forward direction when the missing gear rotates at a predetermined rotation angle in one direction with the tooth portion of the missing gear meshing with the first rack portion of the double rack member. Thereafter, when the missing gear rotates in the same direction, the tooth portion of the missing gear meshes with the second rack portion of the double rack member, and when the missing gear further rotates in the same direction, the wiper returns to the return path. Moving. That is, since the wiper reciprocates as the missing gear rotates in one direction, the wiper can be reciprocated without switching the driving direction of the drive source that rotates the missing gear.

  In the maintenance device, the missing gear has a protruding portion extending in a rotation direction as a part of the missing tooth portion, and meshes between one of the two rack portions and the tooth portion. After the detachment, the protrusion comes into contact with the one rack part before the tooth part meshes with the other rack part.

  Since the double rack member is pushed by the tooth portion through the rack portion while the tooth portion of the missing gear meshes with the rack portion, the double rack member does not move in the direction opposite to the moving direction. . However, since the double rack member is separated from the tooth portion until the tooth portion of the missing gear is separated from the one rack portion and meshed with the other rack portion, there is a possibility that the double gear member may be moved by an unintended external force. is there. In that respect, according to the above configuration, after the meshing of the tooth portion of the missing gear and one of the rack portions is released, the protrusion that is a part of the missing tooth portion contacts the rack portion that has just been disengaged. Unnecessary movement of the double rack member is suppressed. Therefore, until the tooth portion of the missing gear meshes with the other rack portion, the position of the double rack member can be maintained without shifting, and the tooth portion of the missing gear can be properly meshed with the other rack portion.

In the maintenance apparatus, the projecting portion of the missing gear is separated from the one rack portion at a timing when the tooth portion starts to mesh with the other rack portion.
According to this configuration, after the tooth portion of the missing gear is separated from the one rack portion, the protruding portion of the missing tooth portion contacts the one rack portion to suppress unnecessary movement of the double rack member. The protruding portion of the missing tooth portion is separated from one rack portion at a timing when the tooth portion of the missing gear starts to mesh with the other rack portion. Therefore, when the tooth portion of the missing gear meshes with the other rack portion, the double rack member can be moved by the rotation of the missing gear.

  In the maintenance apparatus, the rack portion includes a first meshing portion located at a downstream end in the moving direction of the double rack member, and a second meshing portion located next to the first meshing portion in the moving direction; The tooth portion of the missing gear has a first tooth meshed with the first meshing portion and a second tooth meshed with the second meshing portion, and the second meshing portion is composed of the missing gear. Is arranged at a position that does not engage with the first teeth when meshing with the rack portion.

  According to this configuration, the first meshing portion and the second meshing portion of the rack portion with which the first tooth and the second tooth of the missing gear are respectively engaged are arranged in the moving direction of the double rack member. Is disposed at a position that does not engage with the first tooth, so that when the missing gear rotates in one direction, the first tooth does not engage with the second meshing portion, and the first tooth that is downstream in the moving direction. Engage with the meshing part. Therefore, even if the position of the double rack member is unintentionally shifted downstream in the moving direction when the missing gear and the rack portion are not meshed with each other, the first teeth can mesh with the second meshing portion. As a result, the meshing between the missing gear and the rack portion hardly occurs.

  The maintenance device includes a small gear and a compound gear having a large gear having a larger number of teeth than the small gear, a long rack portion that can mesh with the large gear, and a long rack member that holds the wiper. The double rack member has a short rack portion that can mesh with the small-diameter gear.

  According to this configuration, when the double rack member moves due to the rotation of the missing gear, the small-diameter gear meshed with the short rack portion of the double rack member rotates, whereby the large-diameter gear of the compound gear rotates. Then, the wiper moves together with the long rack member having the long rack portion that meshes with the large-diameter gear. Since the large-diameter gear that moves the long rack member has more teeth than the small-diameter gear that rotates by the movement of the double rack member, the movement distance of the long rack member is larger than the movement distance of the double rack member. Can be long. Therefore, the movement distance of the wiper can be increased according to the size and position of the area to be wiped in the liquid ejecting unit.

A liquid ejecting apparatus that solves the above problem includes a liquid ejecting section capable of ejecting a liquid and the maintenance apparatus.
According to this configuration, the same operational effects as those of the maintenance device can be obtained.

The perspective view showing one embodiment of a liquid ejecting device. FIG. 3 is a cross-sectional view illustrating a schematic configuration of the liquid ejecting apparatus. The top view which shows schematic structure of a maintenance apparatus. The top view of a wiping unit when a wiper exists in an initial position. The top view of a wiping unit when a wiper exists in a return position. The partially exploded perspective view of a wiping unit. The perspective view of a wiping unit. The side view of a wiping unit. The perspective view of a missing gear and a rack part. The perspective view of a wiping unit when the last tooth | gear of a missing gear meshes with the 1st rack part. The perspective view of a wiping unit when a missing gear and a rack part disengage. The perspective view of a wiping unit when a missing gear meshes with a rack part. The perspective view of a wiping unit when the last tooth | gear of a missing gear meshes with the 2nd rack part. The side view which shows the protrusion of the missing gear which contacts a 1st rack part. The side view which shows the effect | action of a missing gear and a rack part. The side view which shows the protrusion of the missing gear which contacts a 2nd rack part. The side view which shows the missing gear and double rack member in a rotation reference position.

  Hereinafter, an embodiment of a liquid ejecting apparatus will be described with reference to the drawings. The liquid ejecting apparatus is an ink jet printer that performs recording (printing) by ejecting ink, which is an example of liquid, on a medium such as paper.

  As shown in FIG. 1, the liquid ejecting apparatus 11 according to this embodiment feeds a leg base 12, a substantially rectangular parallelepiped main body part 13 supported by the leg base 12, and a medium ST toward the main body part 13. And a feeding unit 14 that performs the above-described operation. The feeding unit 14 rotatably holds the medium ST in the state of the roll body RS wound in a roll shape, and unwinds the medium ST by rotating the held roll body RS to feed the medium ST into the main body unit 13. To send.

  In the main body part 13, a support part 15 for supporting the medium ST fed by the feeding part 14 located on the back side in the main body part 13 is disposed, and the support part 15 is provided on the front side of the main body part 13. A paper discharge port 16 for discharging the medium ST supported on the outside of the main body 13 is opened. Further, a plurality of ribs 15 a that support the medium ST are provided on the upper surface side of the support portion 15 along the scanning direction X.

  In the present embodiment, one direction along the longitudinal direction of the main body portion 13 is referred to as a scanning direction X, and the direction in which the medium ST is conveyed on the support portion 15 is referred to as a conveyance direction Y. The scanning direction X and the transport direction Y intersect with each other (for example, orthogonal), and both the scanning direction X and the transport direction Y intersect with the gravity direction Z (for example, orthogonal).

  On one end side of the main body 13 in the scanning direction X, a container holding unit 22 is provided to which a plurality of liquid containers 21 containing ink, which is an example of liquid, are detachably mounted. A plurality (four in this embodiment) of liquid containers 21 are provided for each type (color) of liquid to be stored. Note that the number and size of the liquid containers 21 accommodated in the container holder 22 can be arbitrarily changed. Further, an injection hole is provided in the liquid container 21 so that the liquid can be replenished by injecting the liquid from the injection hole, or printing can be performed while supplying the liquid from the outside through a supply tube connected to the injection hole. You can also do it.

  In the scanning direction X, the end of the main body 13 on which the container holding unit 22 is provided is referred to as a home end, and the opposite end is referred to as an anti-home end. Alternatively, the container holding part 22 may be provided. Further, a plurality (for example, two) of waste liquid container mounting portions 23 are provided vertically below the support portion 15 at positions close to both ends in the scanning direction X.

  As shown in FIG. 2, the liquid ejecting apparatus 11 includes a guide shaft 31 installed in the main body 13 so as to extend in the scanning direction X, a carriage 32 held by the guide shaft 31, and a carriage 32. A liquid ejecting unit 33. The liquid ejecting unit 33 includes a plurality of nozzles 34 that can eject liquid. When the liquid container 21 is attached to the container holding part 22, the liquid stored in the liquid container 21 is supplied to the liquid ejecting part 33 via a supply mechanism (not shown). Then, the liquid ejecting unit 33 ejects the supplied liquid from the nozzle 34 toward the medium ST, whereby printing (recording) is performed.

  A waste liquid container 24 that stores the liquid discharged as the waste liquid from the liquid ejecting unit 33 is detachably mounted on the waste liquid container mounting part 23 (23R, 23L). For example, when performing borderless printing in which printing is performed without leaving a margin at the end of the medium ST, the liquid protruding from the medium ST is received at a portion where the rib 15a of the support portion 15 is not provided, and the waste liquid container mounting portion 23 is received. It is accommodated in a waste liquid container 24 mounted on a waste liquid container mounting part 23 via a waste liquid introduction part 25 provided vertically above.

  In the moving region along the scanning direction X of the liquid ejecting unit 33, if the region where the support unit 15 is provided is the printing region PA, and the regions outside the printing region PA are the non-printing regions RA and LA, the waste liquid container is mounted. The part 23 is arranged at a position corresponding to the printing area PA, and the container holding part 22 is arranged at a position corresponding to the non-printing area RA.

  Further, the liquid ejecting apparatus 11 includes a maintenance device 35 for performing maintenance of the liquid ejecting unit 33. The maintenance device 35 is disposed, for example, in the non-printing area RA, and includes a suction cap 36 and a suction pump 37 for sucking and discharging the liquid from the nozzle 34 of the liquid ejecting unit 33, and a wiping unit 38 for wiping the liquid ejecting unit 33. , A flushing unit 39, a moisturizing cap 40, and a drive source 41.

  The drive source 41 is, for example, one or a plurality of motors for operating each component of the maintenance device 35. The suction cap 36 and the moisturizing cap 40 are configured to be relatively movable with respect to the liquid ejecting unit 33, and perform capping that forms a closed space in which the nozzle 34 opens when relatively moving in the direction approaching the liquid ejecting unit 33. Do. The moisturizing cap 40 suppresses drying of the nozzle 34 by performing capping.

  When the liquid ejecting apparatus 11 does not perform printing, the liquid ejecting unit 33 moves to a position corresponding to the moisturizing cap 40 and stands by while being capped by the moisturizing cap 40. Therefore, the position where the moisture retention cap 40 is located in the scanning direction X is referred to as the home position of the liquid ejecting unit 33. That is, in the scanning direction X of the liquid ejecting section 33, the side where the moisture retaining cap 40 is located is the home side from the printing area PA.

  When the suction pump 37 is driven in a state where the suction cap 36 is capped, the closed space surrounded by the suction cap 36 and the liquid ejecting portion 33 becomes negative pressure, and the negative pressure causes the liquid to be discharged from the nozzle 34. The suction cleaning is performed in which the suction is discharged. The liquid discharged from the nozzle 34 by suction cleaning is stored in the waste liquid container 24 as a waste liquid.

As shown in FIG. 3, the suction pump 37 is, for example, a tube pump provided in the middle of a suction tube 37 a communicating with the suction cap 36.
In the liquid ejecting section 33, a plurality of nozzles 34 arranged at a predetermined interval in the transport direction Y form a nozzle array NL, and two (a pair) nozzle arrays NL whose positions in the transport direction Y are different for each liquid color. Line up. Further, the pair of nozzle rows NL provided for each color are arranged in the scanning direction X in the liquid ejecting unit 33 at a predetermined interval.

  If the surface where the nozzle 34 opens in the liquid ejecting portion 33 is an opening surface 33a, the liquid ejecting portion 33 has a fixed frame 33b for pressing a plate member forming the opening surface 33a. The fixed frame 33b is provided with a plurality of (four in this embodiment) openings 33c so as to expose the opening surfaces 33a in which a large number of nozzles 34 forming a pair of nozzle rows NL are opened.

  The maintenance device 35 includes two suction caps 36 whose positions in the scanning direction X and the transport direction Y are different so as to perform suction cleaning for each pair of nozzle rows NL corresponding to one color ink. Further, the two suction caps 36 form a closed space in which the nozzle 34 is opened by contacting the rectangular opening surface 33 a located in the opening 33 c of the liquid ejecting unit 33 with the frame-shaped tip. .

  The liquid ejecting unit 33 performs flushing to forcibly eject (discharge) droplets regardless of printing from the nozzle 34 for the purpose of preventing and eliminating clogging of the nozzle 34 and the like. The flushing unit 39 receives the liquid discharged from the nozzle 34 by the flushing.

  The flushing unit 39 includes a bottomed box-shaped droplet receiving portion 42 that receives the ejected droplets, and a lid member 43 that covers the opening of the droplet receiving portion 42. The droplet receiving unit 42 has a size corresponding to the pair of nozzle rows NL so that the droplets discharged by the flushing performed for each pair of nozzle rows NL corresponding to the ink of one color can be received. It is formed.

  The lid member 43 moves between a position where the opening of the droplet receiving portion 42 is covered by a driving mechanism (not shown) and a position where the opening of the droplet receiving portion 42 is exposed. A suction tube 37b extending from a suction pump 37, which is a tube pump, is connected to the droplet receiving portion 42. When the suction pump 37 is driven, the liquid received by the droplet receiving portion 42 passes through the suction tube 37b and the waste liquid container 24 ( (See FIG. 2).

Next, the configuration of the wiping unit 38 will be described in detail.
The wiping unit 38 is provided in the vicinity of a guide shaft 51 extending in the transport direction Y, a guide wall 52 extending in the transport direction Y so as to be parallel to the guide shaft 51, and a downstream end of the guide wall 52 in the transport direction Y. The first protrusion 53, a long rack member 54 that engages with the guide shaft 51 and the guide wall 52, and a driving force transmission mechanism 55 are provided. The driving force transmission mechanism 55 converts a rotational motion in one direction obtained by driving the driving source 41 into a linear motion, and the long rack member 54 is conveyed by the driving force transmitted by the driving force transmission mechanism 55. Reciprocate along direction Y.

  The wiping unit 38 includes wipers 58 and 59 that wipe the liquid ejecting unit 33, a holding member 57 that holds the wipers 58 and 59, and a small rack member 62. In the wiping unit 38, when the long rack member 54 moves downstream in the transport direction Y, the wipers 58 and 59 supported by the long rack member 54 via the holding member 57 are in the wiping direction with respect to the liquid ejecting unit 33. The wiping for wiping the liquid ejecting portion 33 is performed by relatively moving in the transport direction Y.

  Two wipers 58 are provided corresponding to the two nozzle rows NL so as to wipe the paired nozzle rows NL by one wiping. The wiper 58 is curved so that the center in the scanning direction X protrudes downstream in the transport direction Y so that the contact pressure particularly near the opening of the nozzle 34 increases.

  The wiper 59 is disposed upstream of the two wipers 58 in the transport direction Y, and has a plate shape extending in the scanning direction X so that the contact pressure with respect to the rectangular opening surface 33a is uniform. Note that the wiping unit 38 may have only one of the wiper 58 and the wiper 59.

  The long rack member 54 includes a mounting portion 56 provided at an end portion on the downstream side of the transport direction Y, which is the longitudinal direction, while the transport direction Y is the longitudinal direction. The holding member 57 holding the wipers 58 and 59 is rotatably attached to the attachment portion 56. Further, the small rack member 62 is held by the mounting portion 56 in such a manner that it can move relative to the mounting portion 56 and the holding member 57 along the transport direction Y.

  The wiping unit 38 moves forward along the long rack member 54 in the transport direction Y downstream from the initial position shown in FIGS. 3 and 4 to the folded position shown in FIG. Further, wiping is performed by the wipers 58 and 59 being in sliding contact with the opening surface 33 a of the liquid ejecting portion 33. Therefore, in the present embodiment, the transport direction Y is the wiping direction in which the wipers 58 and 59 wipe the liquid ejecting unit 33 during wiping.

  Further, the wipers 58 and 59 that have been wiped are switched from the standing posture to the non-standing posture at the folded position, and the long rack member 54 moves backward from the folded position toward the upstream in the transport direction Y, thereby returning to the initial position. Return to. That is, when the long rack member 54 moves backward, the wipers 58 and 59 are in a non-standing posture, so that unnecessary contact between the wipers 58 and 59 and the liquid ejecting unit 33 is avoided.

  In addition, a wiper cleaner for removing the adhering matter attached to the wipers 58 and 59 is disposed in the vicinity of the folding position, and the wipers 58 and 59 are cleaned by the wiper cleaner as the posture of the wipers 58 and 59 is switched. You may make it perform.

  As shown in FIGS. 4 and 5, the holding member 57 is configured to be rotatable about a pair of shaft portions 57 a whose scanning direction X is the rotation axis direction, and is on the proximal end side in the rotation axis direction. The shaft portion 57a (on the right end side in FIGS. 4 and 5) is urged vertically upward by the urging member 61 so as to intersect the rotation axis direction. Although the urging member 61 of the present embodiment is a bar spring, an urging member of another material or form such as a leaf spring, a coil spring, or an elastically deformable rubber member may be employed.

  As shown in FIG. 5, the small rack member 62 has a plate-like portion 63 that extends toward the downstream in the transport direction Y, which is the forward movement direction of the long rack member 54, and the first protrusion 63 a protrudes at the tip thereof. Established. And if the 1st protrusion part 63a collides with the 1st protrusion part 53 when the elongate rack member 54 moves an outward path toward the conveyance direction Y downstream, the movement of the small rack member 62 will be controlled. Then, the small rack member 62 relatively moves toward the upstream in the conveyance direction Y with respect to the long rack member 54 that continuously moves in the backward direction toward the downstream in the conveyance direction Y, and the small rack member 62 is associated with the relative movement. Rotates the holding member 57. At this time, the position of the wipers 58 and 59 is switched from the standing posture to the non-standing posture by the rotation of the holding member 57.

  Further, a second protrusion 52 a protruding in the scanning direction X is provided at the upstream end of the guide wall 52 in the transport direction Y. Then, when the small rack member 62 hits the second protrusion 52a when the long rack member 54 moves backward in the transport direction Y, the movement of the small rack member 62 is restricted. Then, the small rack member 62 relatively moves toward the downstream in the transport direction Y with respect to the long rack member 54 that continuously moves in the backward direction toward the upstream in the transport direction Y, and the small rack member 62 is associated with the relative movement. Rotates the holding member 57. At this time, the wipers 58 and 59 are switched from the non-standing posture to the standing posture by the rotation of the holding member 57.

Next, the configuration of the driving force transmission mechanism 55 will be described in detail.
As shown in FIG. 6, the driving force transmission mechanism 55 is relatively moved along the conveyance direction Y with respect to the missing gear 80 that rotates by the driving force of the motor that is the driving source 41 (see FIG. 3). A plate-shaped double rack member 81 capable of rotation and a compound gear 83 that can rotate around a rotation pin 82 are provided.

  In the driving force transmission mechanism 55, the missing gear 80 reciprocates the double rack member 81 along the transport direction Y in accordance with the rotational drive in one direction of the motor that is the drive source 41, and further the double rack member The compound gear 83 that rotates with the movement of 81 reciprocates the long rack member 54 along the transport direction Y, thereby reciprocating the wipers 58 and 59. A rotation shaft (not shown) of the missing gear 80 is rotatably supported by a support portion (not shown), and the rotation pin 82 serving as the rotation shaft of the compound gear 83 includes, for example, a guide wall 52 and a double rack member. 81 and is rotatably supported by both of the rotary shafts.

  The compound gear 83 includes a small diameter gear 85 and a large diameter gear 84 having more teeth than the small diameter gear 85. In each component of the driving force transmission mechanism 55, the large diameter gear 84 is disposed on the back surface side of the small diameter gear 85 when the home side is the front surface side and the non-home side is the back surface side. A long rack portion 54 a that can mesh with the large-diameter gear 84 is extended along the transport direction Y on the back side of the long rack member 54 that holds the wipers 58 and 59. Further, on the back side of the double rack member 81, a short rack portion 86 that can mesh with the small-diameter gear 85 and has a smaller number of teeth than the long rack portion 54 a is extended along the transport direction Y.

  When the double rack member 81 moves along the transport direction Y, the small-diameter gear 85 that meshes with the short rack portion 86 rotates, so that the large-diameter gear 84 of the compound gear 83 rotates. Then, the long rack member 54 having the long rack portion 54 a meshing with the large-diameter gear 84 moves in the same direction as the double rack member 81 at a higher speed than the double rack member 81. That is, the long rack member 54 moves in the same direction as the double rack member 81 with the movement of the double rack member 81, but the moving distance at that time is longer than that of the double rack member 81.

  As shown in FIG. 7, on the surface side of the double rack member 81, a pair of first rack portion 87 and second rack portion 88 are point-symmetric in the transport direction Y as viewed from the home side. It extends along. The missing gear 80 includes a tooth portion 90 that alternately meshes with the two rack portions 87 and 88 that form a pair when rotating in one direction F, a missing tooth portion 97 that is arranged side by side with the tooth portion 90 in the rotation direction, Have

  The tooth part 90 of the missing gear 80 has tooth-like protrusions 91, 92, 93, 94, 95, 96 composed of a plurality of (six in this embodiment) convex parts arranged in the rotation direction. In the tooth part 90, the tooth-like protrusions 93, 94, and 95 are standard teeth provided at a regular pitch. The tooth-like protrusion 92 positioned between the tooth-like protrusion 91 and the tooth-like protrusion 93 has a missing tooth region that omits the formation of one tooth gap.

  The tooth-like protrusion 96 has a tooth surface facing the tooth surface of the tooth-like protrusion 95 located adjacent to the tooth-like protrusion 96 and is integrally formed with a protrusion 98 composed of a missing tooth region in which a plurality of tooth gaps are omitted. Is formed. The projecting portion 98 extending in the rotation direction is a part of the missing tooth portion 97, and after the engagement between any one of the two rack portions 87 and 88 and the tooth portion 90 is released, the tooth portion 90. Before the meshing with the other rack part, the protrusion 98 comes into contact with the one rack part just disengaged, thereby restraining the movement of the double rack member 81.

  As shown in FIG. 8, the first rack portion 87 has tooth-like protrusions 101, 102, 103 composed of a plurality of (six in this embodiment) convex portions arranged from the downstream side in the transport direction Y toward the upstream side. , 104, 105, 106. In the first rack portion 87, the tooth-like protrusions 103, 104, 105 are standard teeth provided at a regular pitch.

  Between the tooth-like protrusion 102 and the tooth-like protrusion 103, a missing tooth region 102a in which one tooth-like protrusion having a regular pitch is missing is provided. The tooth-like protrusion 101 located at the downstream end in the transport direction Y has a tooth surface facing the tooth surface of the tooth-like protrusion 102 located adjacent thereto. Further, the tooth-like protrusion 106 positioned at the upstream end in the transport direction Y has an extending portion 106 a that extends while being inclined from the tooth surface on the upstream side in the transport direction Y to the upstream in the transport direction Y. The extended portion 106a contacts the protruding portion 98 of the missing gear 80 after the first rack portion 87 and the tooth portion 90 of the missing gear 80 are disengaged (see FIG. 14).

  The second rack portion 88 includes tooth-like protrusions 111, 112, 113, 114, which are composed of a plurality of (six in this embodiment) convex portions arranged in the wiping direction from the upstream side to the downstream side in the transport direction Y. 115, 116. In the second rack portion 88, the tooth-like protrusions 113, 114, and 115 are standard teeth provided at a regular pitch.

  Between the tooth-like protrusion 112 and the tooth-like protrusion 113, a missing tooth region 112a lacking one tooth-like protrusion having a regular pitch is provided. The tooth-like protrusion 111 located at the upstream end in the transport direction Y has a tooth surface facing the tooth surface of the tooth-like protrusion 112 located adjacent thereto. Further, the tooth-like protrusion 116 positioned at the downstream end in the transport direction Y has an extending portion 116a that extends while being inclined from the tooth surface on the downstream side in the transport direction Y to the downstream in the transport direction Y. The extension portion 116 a contacts the protrusion 98 of the missing gear 80 after the second rack portion 88 and the tooth portion 90 of the missing gear 80 are disengaged.

  When the tooth portion 90 of the missing gear 80 meshes with the first rack portion 87, the tooth-like protrusions 91, 92, 93, 94, 95, 96 of the tooth portion 90 are respectively tooth-like protrusions of the first rack portion 87. Engage with the parts 101, 102, 103, 104, 105, 106. Further, when the tooth portion 90 of the missing gear 80 meshes with the second rack portion 88, the tooth-like protrusions 91, 92, 93, 94, 95, 96 of the tooth portion 90 are respectively teeth of the second rack portion 88. The protrusions 111, 112, 113, 114, 115, 116 are engaged.

  Therefore, in the rack parts 87 and 88, the 1st meshing part located in the downstream end in the moving direction of the double rack member 81 is the tooth-like protrusions 101 and 111, respectively, and is adjacent to the 1st meshing part in the moving direction. The second meshing portions located are tooth-like protrusions 102 and 112, respectively. In the rack portions 87 and 88, the first meshing portion that meshes with the tooth portion 90 of the missing gear 80 is the first meshing portion located at the downstream end in the movement direction, and the tooth-like protrusion located at the upstream end in the movement direction. The portions 106 and 116 are the last meshing portions that mesh with the teeth 90 of the missing gear 80 last.

  Further, in the tooth portion 90 of the missing gear 80, the first teeth that mesh with the first meshing portions of the rack portions 87 and 88 are tooth-like projections 91, and the second teeth that mesh with the second meshing portion are tooth-like projections. Part 92. In the tooth portion 90 of the missing gear 80, the last tooth that meshes with the last meshing portion is a tooth-like projection 96.

  As shown in FIG. 9, the tooth-like protrusion 91 that is the first tooth of the missing gear 80 and the tooth-like protrusion 96 that is the last meshing part of the missing gear 80 are a tooth-like protrusion 92 that is positioned between them. , 93, 94, 95 are shorter in the scanning direction X, which is the rotational axis direction of the missing gear 80. For example, among the end faces of the tooth-like protrusions 91, 92, 93, 94, 95, 96, the positions of the end faces on the front surface side are aligned, but the positions of the end faces on the back surface side are the tooth-like protrusions 92, 93, The tooth-like protrusions 91 and 96 are located closer to the home side than 94 and 95. In FIG. 9, the relative position with respect to the second rack portion 88 is changed in order to clearly show the configuration of the missing gear 80.

  On the other hand, in the rack portions 87 and 88, the tooth-like protrusions 102 and 112 that mesh with the tooth-like projection 92 that is the second tooth of the missing gear 80 are the first when the missing gear 80 meshes with the rack portions 87 and 88. It arrange | positions in the position which does not engage with the tooth-like protrusion 91 which is 1 tooth. For example, the tooth-like protrusions 102 and 112 are located on the opposite side of the moving path of the tooth-like protrusion 91 (the end surface on the back side of the tooth-like protrusion 91) in the rotational axis direction of the missing gear 80. Further, the extending portions 106 a and 116 a extending from the tooth-like protrusions 106 and 116 are more than the movement path of the tooth-like protrusion 96 (the end surface on the back side of the tooth-like protrusion 96) in the rotation axis direction of the missing gear 80. Located on the non-home side.

  Therefore, as shown in FIG. 8, when the tooth portion 90 of the missing gear 80 meshes with the first rack portion 87, the tooth-like projection 91 of the missing gear 80 does not engage with the tooth-like projection 102. The tooth-like projections 91 and 92 of the missing gear 80 are engaged with the tooth-like projections 101 and 102 of the first rack portion 87 at the same timing, respectively, and the tooth-like projection 92 is brought into the missing tooth region 102a. Be contained.

  Further, as shown in FIG. 9, when the tooth portion 90 of the missing gear 80 meshes with the second rack portion 88, the tooth-like projection 91 of the missing gear 80 does not engage with the tooth-like projection 112. The tooth-like projections 91 and 92 of the missing gear 80 are engaged with the tooth-like projections 111 and 112 of the first rack portion 87 at the same timing, respectively, and the tooth-like projection 92 enters the missing tooth region 112a. Be contained.

Next, the reciprocating operation of the double rack member 81 when the missing gear 80 makes one rotation in one direction F will be described.
When the wipers 58 and 59 are in the standing posture and are in the initial positions shown in FIGS. 3 and 4, the missing gear 80 is in the rotation reference position (rotation angle 0 °) shown in FIG. When the reference gear M for rotation is provided on the missing gear 80, when the missing gear 80 is at the reference rotation position, the reference mark M points vertically upward. When the missing gear 80 is at the rotation reference position, the tooth portion 90 of the missing gear 80 is positioned vertically below the first rack portion, and the conveying direction Y upstream of the tooth-like protrusions 101 and 102 of the first rack portion 87. The tooth-like protrusions 91 and 92 of the missing gear 80 are located respectively.

  When the motor as the drive source 41 (see FIG. 3) is driven to rotate in one direction, the missing gear 80 starts to rotate in one direction F from the rotation reference position. Then, the tooth-like protrusions 91 and 92 of the missing gear 80 mesh with and push the tooth-like protrusions 101 and 102 of the first rack part 87, so that the double rack member 81 moves downstream in the transport direction Y. Start.

  Subsequently, the tooth-like protrusions 93, 94, 95, and 96 of the missing gear 80 are sequentially engaged with the tooth-like protrusions 103, 104, 105, and 106 of the first rack part 87, and the double rack member 81 is attached. It moves toward the conveyance direction Y downstream. Then, due to the action of the composite gear 83, the long rack member 54 moves toward the downstream in the transport direction Y at a speed higher than that of the double rack member 81, and the wipers 58 and 59 perform wiping along with the movement.

  As shown in FIG. 10, when the tooth-like projection 96 that is the last tooth of the missing gear 80 meshes with the tooth-like projection 106 that is the last meshing portion of the first rack portion 87, the missing gear 80. The rotation angle from the rotation reference position is approximately 90 °.

  As shown in FIG. 11, immediately before the long rack member 54 reaches the folded position, the wipers 58 and 59 are switched from the standing posture to the non-standing posture. Thereafter, when the meshing between the missing gear 80 and the first rack portion 87 is released, the forward movement of the double rack member 81 downstream in the transport direction Y ends. At this time, the long rack member 54 holding the wipers 58 and 59 reaches the folding position.

  Even after the missing gear 80 and the first rack portion 87 are disengaged and the movement of the double rack member 81 is stopped, the missing gear 80 continues to rotate in one direction F. During this time, the protruding portion 98 of the missing gear 80 is used. Is engaged with the tooth-like protrusion 106, the double rack member 81 is restrained from moving upstream in the transport direction Y.

  As shown in FIG. 12, when the rotation angle of the missing gear 80 from the rotation reference position becomes approximately 180 °, the tooth-like protrusions 91 and 92 of the missing gear 80 become tooth-like protrusions 111 and 112 of the second rack portion 88. , The double rack member 81 starts moving toward the upstream in the transport direction Y.

  Subsequently, the tooth-like protrusions 93, 94, 95, and 96 of the missing gear 80 mesh with the tooth-like protrusions 113, 114, 115, and 116 of the second rack part 88, respectively, and the double rack member 81 is moved in the transport direction. Move towards Y upstream. At this time, due to the action of the compound gear 83, the long rack member 54 moves toward the upstream in the transport direction Y at a speed higher than that of the double rack member 81.

  Then, as shown in FIG. 13, after the tooth-like projection 96 that is the last tooth of the missing gear 80 meshes with the tooth-like projection 116 that is the last meshing portion of the second rack portion 88, the long rack member Immediately before 54 reaches the initial position, the wipers 58 and 59 are switched from the non-standing posture to the standing posture.

  Thereafter, when the meshing between the missing gear 80 and the second rack portion 88 is disengaged, the return path movement of the double rack member 81 upstream in the transport direction Y ends. At this time, the long rack member 54 holding the wipers 58 and 59 reaches the initial position.

  Even after the meshing between the missing gear 80 and the second rack portion 88 is disengaged and the movement of the double rack member 81 is stopped, the missing gear 80 continues to rotate in one direction F. During this time, the protruding portion 98 of the missing gear 80 is provided. Is engaged with the tooth-like protrusion 116, and the double rack member 81 is suppressed from moving downstream in the transport direction Y.

Next, the operation of the maintenance device 35 and the liquid ejecting apparatus 11 configured as described above will be described with particular attention paid to the function of the wiping unit 38.
In the wiping unit 38, the double rack member 81 moves the wipers 58 and 59 forward when the first rack portion 87 meshes with the missing gear 80, and the wiper unit 81 moves when the second rack portion 88 meshes with the missing gear 80. 58 and 59 are moved in the backward direction. Therefore, the wiper 58 and 59 can be reciprocated by the rotation of the missing gear 80 in one direction F without switching the drive direction of the drive source 41 by the action of the drive force transmission mechanism 55.

  That is, the wipers 58 and 59 move in the wiping direction in the wiping direction together with the double rack member 81 and the long rack member 54 while the missing gear 80 rotates 180 ° in one direction F, wipe the liquid ejecting portion 33, and While the gear 80 further rotates 180 ° in one direction F, the gear 80 moves backward in the direction opposite to the wiping direction. For this reason, the wipers 58 and 59 are moved in the forward direction by rotational driving in one direction of the drive source 41 and the wipers 58 and 59 are moved in the backward direction by rotational driving in the other direction of the driving source 41. Since it is not necessary to change the driving direction of the driving source 41 in order to reverse the moving direction, the control of the driving source 41 accompanying wiping can be simplified.

  Here, in the maintenance device 35, the movement of the wipers 58 and 59, the movement of the caps 36 and 40, the driving of the suction pump 37, the movement of the lid member 43 of the flushing unit 39, etc. It is conceivable to operate a plurality of components. As described above, when a plurality of components are operated by one drive source 41, the switching of the drive direction of the drive source 41 performed for one component also affects the operation of other components. Therefore, it is preferable to simplify the control of the drive source 41 for one component as much as possible. In that respect, according to the present embodiment, the wipers 58 and 59 can be reciprocated without changing the drive direction of the drive source 41, so that a single drive source 41 can operate a plurality of components. Is suitable.

  By the way, the number of teeth provided on the tooth portion 90 of the missing gear 80 can be changed according to the moving distance of the wipers 58 and 59 necessary for wiping. For example, in the present embodiment, the tooth portions 90 are not provided on the outer peripheral portion of about half a circumference of the missing gear 80, but the protrusions 98 are disposed on a part of the half circumference, and the movement distances of the wipers 58 and 59 are moved. Is adjusted. That is, even if the missing gear 80 rotates in one direction F, the wipers 58 and 59 do not move while the projecting portion 98 of the missing gear 80 is in contact with the rack portions 87 and 88.

  For example, as shown in FIG. 14, after the last tooth of the missing gear 80 and the last meshing portion of the first rack portion 87 are disengaged, the first tooth of the missing gear 80 meshes with the second rack portion 88. In the meantime, the protrusion 98 is brought into contact with the tip of the tooth-like protrusion 106 of the first rack part 87 and the extending part 106a, so that the double rack member 81 is prevented from moving upstream in the transport direction Y. Stop in state. Therefore, for example, even when an external force is applied to the double rack member 81 stopped by vibration or the like, the position of the double rack member 81 does not shift upstream in the transport direction Y.

  As shown in FIG. 15, when the double rack member 81 finishes the outward movement and is waiting until the start of the outward movement, the double rack member 81 moves downstream in the transport direction Y due to an unintended external force or the like. For example, it is assumed that the tooth-like protrusion 112 has moved to a position indicated by a two-dot chain line in FIG. Also in this case, the tooth-like protrusion 112 is not engaged with the tooth-like protrusion 91 because the tooth-like protrusion 112 is in a position shifted in the rotational axis direction from the tooth-like protrusion 91 that is the first tooth of the missing gear 80. In addition, since the tooth-shaped projection 112 and the tooth-shaped projection 113 are provided with a tooth-missing region 112a in which one tooth-shaped protrusion having a regular pitch is missing, the second tooth of the missing gear 80 is used. A certain tooth-shaped protrusion 92 does not mesh with the second rack portion 88. Therefore, the shift of the meshing position such that the first tooth of the missing gear 80 meshes with the second meshing portion of the rack portions 87 and 88 hardly occurs.

  As shown in FIG. 15, when the missing gear 80 rotates about 180 ° from the rotation reference position (rotation angle 0 °), the first tooth of the missing gear 80 starts to mesh with the second rack portion 88. The protrusion 98 is separated from the first rack portion 87. As a result, the restriction on the upstream movement in the transport direction Y with respect to the double rack member 81 is released, and when the missing gear 80 is rotated in a state of being engaged with the second rack portion 88, the double rack member 81 is moved in the transport direction. Move back Y upstream.

  Similarly, as shown in FIG. 16, after the last tooth of the missing gear 80 and the last meshed portion of the second rack portion 88 are disengaged, the first tooth of the missing gear 80 is connected to the first rack portion 87. Until the engagement, the protrusion 98 comes into contact with the tip of the tooth-like protrusion 116 of the first rack portion 87 and the extending portion 116a, so that the double rack member 81 is prevented from moving downstream in the transport direction Y. Stop in the state. Therefore, for example, even when an external force is applied to the double rack member 81 stopped by vibration or the like, the position of the double rack member 81 does not shift downstream in the transport direction Y.

  As shown in FIG. 17, when the missing gear 80 rotates once (360 ° rotation) from the rotation reference position (rotation angle 0 °), the first teeth of the missing gear 80 start to mesh with the first rack portion 87. At the timing, the projecting portion 98 moves away from the second rack portion 88. Accordingly, the restriction on the movement in the transport direction Y downstream with respect to the double rack member 81 is released. Therefore, when the missing gear 80 is rotated in a state of being engaged with the first rack portion 87, the double rack member 81 is moved in the transport direction. Move forward Y downstream.

According to the above embodiment, the following effects can be obtained.
(1) The wipers 58 and 59 are rotated when the missing gear 80 rotates in one direction F at a predetermined rotation angle in a state where the tooth portion 90 of the missing gear 80 is engaged with the first rack portion 87 of the double rack member 81. Move forward. Thereafter, when the missing gear 80 rotates in the same one direction F, the tooth portion 90 of the missing gear 80 meshes with the second rack portion 88 of the double rack member 81, and in this state, the missing gear 80 is in the same one direction F. Further rotation of the wipers 58, 59 causes the wipers 58, 59 to move backward. That is, since the wipers 58 and 59 reciprocate with the rotation of the missing gear 80 in one direction F, the wipers 58 and 59 are reciprocated without switching the driving direction of the drive source 41 that rotates the missing gear 80. be able to.

  (2) While the tooth portion 90 of the missing gear 80 meshes with the rack portions 87 and 88 and the wipers 58 and 59 are moving, the double rack member 81 is pushed against the tooth portion 90 via the rack portions 87 and 88. Therefore, it does not move in the direction opposite to the moving direction. However, since the double rack member 81 is separated from the tooth portion 90 until the tooth portion 90 of the missing gear 80 is separated from the one rack portion and meshes with the other rack portion, the double rack member 81 moves due to an unintended external force. There is a risk that. In that respect, according to the above-described embodiment, after the engagement between the tooth portion 90 of the missing gear 80 and one of the rack portions is released, the protrusion 98 that is a part of the missing tooth portion 97 has just been disengaged. Therefore, unnecessary movement of the double rack member 81 is suppressed. Therefore, until the tooth portion 90 of the missing gear 80 meshes with the other rack portion, the position of the double rack member 81 is maintained without shifting, and the tooth portion 90 of the missing gear 80 is appropriately meshed with the other rack portion. Can do.

  (3) After the tooth portion 90 of the missing gear 80 is separated from the one rack portion, the protruding portion 98 of the missing tooth portion 97 comes into contact with the one rack portion to suppress unnecessary movement of the double rack member 81. However, the projecting portion 98 of the missing tooth portion 97 is separated from one rack portion at the timing when the tooth portion 90 of the missing gear 80 starts to mesh with the other rack portion. Therefore, when the tooth portion 90 of the missing gear 80 meshes with the other rack portion, the double rack member 81 can be moved by the rotation of the missing gear 80.

  (4) The first meshing portion and the second meshing portion of the rack portions 87 and 88 with which the first tooth (tooth-like projection 91) and the second tooth (tooth-like projection 92) of the missing gear 80 are engaged, Although arranged in the moving direction of the double rack member 81, the second meshing portion is arranged at a position where it does not engage with the first tooth. As a result, when the missing gear 80 rotates in one direction F, the first tooth engages with the first meshing portion that is further downstream in the moving direction without engaging with the second meshing portion. Therefore, even if the position of the double rack member 81 is unintentionally shifted downstream in the moving direction when the missing gear 80 and the rack portions 87 and 88 are not meshed with each other, the first tooth is engaged with the second mesh. Since the gears are not meshed with each other, misalignment between the missing gear 80 and the rack portions 87 and 88 is unlikely to occur.

  (5) When the double rack member 81 is moved by the rotation of the missing gear 80, the small diameter gear 85 meshed with the short rack portion 86 of the double rack member 81 is rotated, whereby the large diameter gear 84 of the compound gear 83 is rotated. To do. Then, the wipers 58 and 59 move together with the long rack member 54 having the long rack portion 54a meshing with the large diameter gear 84. Since the large-diameter gear 84 that moves the long rack member 54 has more teeth than the small-diameter gear 85 that rotates due to the movement of the double rack member 81, the movement distance of the long rack member 54 is set to the double rack member. The moving distance can be longer than 81. Therefore, the moving distance of the wipers 58 and 59 can be increased according to the size and position of the area to be wiped in the liquid ejecting unit 33.

In addition, you may change the said embodiment like the example of a change shown below.
Standard teeth having the same length in the direction of the rotation axis arranged at regular pitches without providing tooth missing portions or tooth missing regions in the tooth portion 90 of the missing gear 80 and the rack portions 87 and 88 of the double rack member 81 You may comprise the tooth | gear part 90 and the rack parts 87 and 88 only by a tooth-like protrusion).

The missing gear 80 may not include the protrusion 98. Alternatively, the length of the projecting portion 98 of the missing gear 80 in the rotation direction may be shortened.
The wiping unit 38 may not include the compound gear 83 and the long rack member 54, and the double rack member 81 may hold the wipers 58 and 59.

  When the extending portions 106a and 116a are not provided on the tooth-like protrusions 106 and 116, respectively, and the meshing between the missing gear 80 and the rack portions 87 and 88 is disengaged, the protrusion 98 has the tooth-like protrusions 106 and 116. You may make it contact only the front-end | tip of. However, if the extending portions 106a and 116a are provided on the tooth-like protrusions 106 and 116, respectively, and the contact area with the protrusion 98 is increased, the wear of the tooth-like protrusions 106 and 116 is suppressed, and the double protrusion is more reliably performed. Since the movement of the rack member 81 can be suppressed, it is preferable.

The wiping unit 38 may not include the urging member 61.
In addition to the wipers 58 and 59 of the above-described embodiment, the holding member 57 is in a standing position when the wipers 58 and 59 are in a non-standing position, and is not standing when the wipers 58 and 59 are in a standing position. You may hold another wiper in a posture. In this case, wiping by the wipers 58 and 59 can be performed when the long rack member 54 moves in the outward path, and wiping by another wiper can be performed when the long rack member 54 moves in the backward path. This makes it possible to efficiently perform twice wiping with a wiper having different properties, such as, for example, after removing the fixed matter with the wipers 58 and 59 having a strong scraping power and then wiping with another wiper having a strong liquid absorbing power. it can. In addition, the shape and material of the wiper can be arbitrarily changed, such as changing to an absorbent body capable of absorbing liquid or making it into a roll.

The maintenance device 35 is not limited to the one fixed to the liquid ejecting apparatus 11 and may be detachably attached to the main body portion 13.
The components of the maintenance device 35 are not limited to the combinations exemplified in the above embodiment, and may include, for example, only the wiping unit 38, and all the nozzles 34 can be sucked simultaneously in addition to the wiping unit 38. A suction mechanism may be provided.

The container holding unit 22 may be changed to a so-called on-carriage type liquid ejecting apparatus 11 provided on the carriage 32.
The liquid container 21 does not necessarily need to be entirely accommodated in the main body part 13, and a part of the liquid container 21 mounted on the container holding part 22 may protrude from the main body part 13.

  The liquid ejecting apparatus 11 may be changed to a so-called full-line type liquid ejecting apparatus that does not include the carriage 32 but includes an elongated fixed liquid ejecting unit corresponding to the entire width of the medium. In this case, the liquid ejecting unit may have a plurality of unit heads having nozzles arranged in parallel so that the printing range extends over the entire width of the medium. By arranging a large number of nozzles so as to cover the entire area, the printing range may extend over the entire width of the medium.

  The liquid ejected by the liquid ejecting unit is not limited to ink, and may be, for example, a liquid material in which functional material particles are dispersed or mixed in the liquid. For example, recording is performed by ejecting a liquid material in which a material such as an electrode material or a color material (pixel material) used for manufacturing a liquid crystal display, an EL (electroluminescence) display, and a surface emitting display is dispersed or dissolved. It may be configured.

  The medium is not limited to paper, and may be a plastic film, a thin plate, or the like, or may be a fabric used in a printing apparatus.

  DESCRIPTION OF SYMBOLS 11 ... Liquid injection apparatus, 33 ... Liquid injection part, 35 ... Maintenance apparatus, 54 ... Long rack member, 54a ... Long rack part, 58, 59 ... Wiper, 80 ... Missing gear, 81 ... Double rack member, 83 ... compound gear, 84 ... large gear, 85 ... small gear, 86 ... short rack part, 87 ... first rack part, 88 ... second rack part, 90 ... tooth part, 91 ... as the first tooth of the missing gear Tooth-like projections 92 ... Tooth-like projections as second teeth of the missing gear, 97 ... Tooth-like projections, 98 ... Projections, 101, 111 ... Tooth-like projections as first meshing portions of the rack portion, 102 112 ... A tooth-like protrusion as a second meshing portion of the rack portion.

Claims (6)

A wiper for wiping the liquid ejection part;
A double rack member having a pair of rack parts including a first rack part and a second rack part, and reciprocatingly moving the wiper;
Tooth portions alternately meshing with the two rack portions that make a pair when rotating in one direction, and a missing gear having a tooth missing portion arranged side by side with the tooth portions in the rotation direction;
With
The double rack member moves the wiper forward when the first rack portion meshes with the missing gear, and moves the wiper backward when the second rack portion meshes with the missing gear. A maintenance device. The missing gear has a protruding portion extending in the rotation direction as a part of the missing tooth portion, and after the meshing between one of the two rack portions and the tooth portion is released, The maintenance device according to claim 1, wherein the protrusion comes into contact with the one rack portion before the tooth portion meshes with the other rack portion. 3. The maintenance device according to claim 2, wherein the projecting portion is separated from the one rack portion at a timing at which the tooth portion starts meshing with the other rack portion. The rack portion has a first meshing portion located at a downstream end in the movement direction of the double rack member, and a second meshing portion located next to the first meshing portion in the movement direction,
The tooth portion of the missing gear has a first tooth meshing with the first meshing portion and a second tooth meshing with the second meshing portion,
The said 2nd meshing part is arrange | positioned in the position which does not engage with a said 1st tooth | gear when the said missing gear meshes with the said rack part. The maintenance device according to the item. A compound gear having a small-diameter gear and a large-diameter gear having more teeth than the small-diameter gear;
A long rack member having a long rack portion meshable with the large-diameter gear and holding the wiper;
With
The maintenance device according to any one of claims 1 to 4, wherein the double rack member includes a short rack portion that can mesh with the small-diameter gear. A liquid ejecting section capable of ejecting liquid;
The maintenance device according to any one of claims 1 to 5,
A liquid ejecting apparatus comprising: